215916 535 Revision A
Fault Codes
Telltale
Short
Description
Full Fault
Description
Recommended
Fix/Check Message
SA SPN FMI
178 521186
7
Electrical
System
Brake Lights, Cab Fwd BK1 Relay Normally closed
contact is shorted
Replace relay
178 521194
1
Electrical
System
High Beam, Engine Fwd BK2 Relay coil open or not
present
Check chassis module for missing relay. Replace relay.
178 521194 2
Electrical
System
High Beam, Engine Fwd BK2 Relay Coil shorted or
failed relay driver
Replace relay
178 521194 3
Electrical
System
High Beam, Engine Fwd BK2 Relay Normally Open
contact is open
Replace relay
178 521194
4
Electrical
System
High Beam, Engine Fwd BK2 Relay Normally Closed
contact is open
Replace relay
178 521194
5
Electrical
System
High Beam, Engine Fwd BK2 Relay coil is not
receiving power
Contact Dealer
178 521194 6
Electrical
System
High Beam, Engine Fwd BK2 Relay Normally open
contact is shorted
Replace relay
178 521194
7
Electrical
System
High Beam, Engine Fwd BK2 Relay Normally closed
contact is shorted
Replace relay
178 521202
1
Electrical
System
Wiper, Cab Fwd BK7 Relay coil open or not
present
Check chassis module for missing relay. Replace relay.
178 521202 2
Electrical
System
Wiper, Cab Fwd BK7 Relay Coil shorted or
failed relay driver
Replace relay
178 521202 3
Electrical
System
Wiper, Cab Fwd BK7 Relay Normally Open
contact is open
Replace relay
178 521202
4
Electrical
System
Wiper, Cab Fwd BK7 Relay Normally Closed
contact is open
Replace relay
178 521202
5
Electrical
System
Wiper, Cab Fwd BK7 Relay coil is not
receiving power
Contact Dealer
178 521202 6
Electrical
System
Wiper, Cab Fwd BK7 Relay Normally open
contact is shorted
Replace relay
178 521202
7
Electrical
System
Wiper, Cab Fwd BK7 Relay Normally closed
contact is shorted
Replace relay
178 521210
1
Electrical
System
Low Beam Lights, EF BK5 Relay coil open or not
present
Check chassis module for missing relay. Replace relay.
178 521210 2
Electrical
System
Low Beam Lights, EF BK5 Relay Coil shorted or
failed relay driver
Replace relay
REFERENCE